NXP SN110TUK1/B201X4Z: A Comprehensive Technical Overview of the Advanced NFC and Secure Element Solution

The convergence of Near Field Communication (NFC) and robust security is a cornerstone of modern contactless applications, from mobile payments to secure access control. At the heart of many of these systems lies the NXP SN110TUK1/B201X4Z, a highly integrated chip that combines an advanced NFC frontend with a Common Criteria EAL 6+ certified Secure Element. This article provides a detailed technical examination of this powerful solution.

The SN110TUK1 is engineered as a full NFC Forum-compliant solution, supporting Reader/Writer, Card Emulation, and Peer-to-Peer modes of operation. Its standout feature is the monolithic integration of the NFC controller (PN80T) with a high-assurance secure element (SmartMX3). This integration eliminates the need for discrete components, simplifying design, reducing the PCB footprint, and enhancing overall system reliability. The chip supports a wide RF input power range, ensuring stable performance even in challenging electromagnetic environments.

The true differentiator of this solution is its embedded SmartMX3 Secure Element. This hardware-based security core is certified to Common Criteria EAL 6+, one of the highest levels of assurance available for commercial security chips. It provides a tamper-resistant environment for the storage of sensitive credentials—such as credit card data, cryptographic keys, and personal identification information—and the execution of critical security operations. This makes it an ideal choice for applications demanding the highest levels of trust, including host card emulation (HCE) for payment systems, digital car keys, and electronic government documents like e-passports.

From an integration perspective, the SN110TUK1 is designed for flexibility. It features a single-wire protocol (SWP) interface for connecting to an external modem (e.g., in a smartphone) and a standard I²C host interface for communication with the application processor. This allows it to function seamlessly within a variety of architectures, whether as part of an embedded system or within a removable form factor. Its low-power design is also critical for battery-powered mobile devices, ensuring minimal drain during polling and transaction activities.

In practice, the SN110TUK1/B201X4Z enables OEMs to develop cutting-edge products. In smartphones, it secures mobile wallet transactions via platforms like Google Pay. In the automotive sector, it forms the secure core for passive entry and passive start (PEPS) systems, turning a smartphone into a digital car key. In IoT, it provides a simple and secure method for device pairing and commissioning.

ICGOODFIND: The NXP SN110TUK1/B201X4Z is a premier integrated security and connectivity solution, merging a high-performance NFC controller with a top-tier certified Secure Element. Its unparalleled hardware-based security, compact form factor, and design flexibility make it an indispensable component for developers creating the next generation of secure, contactless applications.

Keywords: Secure Element, NFC Controller, Common Criteria EAL 6+, Host Card Emulation (HCE), Single Wire Protocol (SWP)